NumberResearch Membership · Data 09/20/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 979
SOUTHWESTERN BELL 59
FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 54
NEW CINGULAR WIRELESS PCS, LLC - IL 47
LEVEL 3 COMMUNICATIONS, LLC - TX 30
AERIAL COMMUNICATIONS, INC. 29
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
— 979-475 0–9 XXXall 10 · 5 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 EL CAMPO TX
— 979-476 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BAY CITY TX
— 979-478 5XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 WALLIS TX
— 979-479 6XXX7XXX8XXX9XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BAY CITY TX
— 979-480 1XXX2XXX8XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 CLTLKJCKSN TX
— 979-481 5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 ANGLETON TX
— 979-482 5XXX8XXX9XXX · 3 holders which blocks → METROPCS, INC. 5562 FREEPORT TX
— 979-484 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 COLUMBUS TX
— 979-485 1XXX2XXX3XXX5XXX6XXX9XXX · 2 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BRYAN TX
— 979-487 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 CLTLKJCKSN TX
— 979-490 0XXX which blocks → WINDSTREAM SUGAR LAND, LLC 2147 SWEENY TX
— 979-491 7XXX9XXX · 2 holders which blocks → WINDSTREAM SUGAR LAND, LLC 2147 SWEENY TX
— 979-492 2XXX which blocks → METROPCS, INC. 5562 BRYAN TX
— 979-493 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLC - TX 903C COLUMBUS TX
— 979-505 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SCHULENBG TX
— 979-511 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 979-512 not yet reported which blocks → TX
— 979-529 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J CLTLKJCKSN TX
— 979-530 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - TX 6114 BRENHAM TX
— 979-531 2XXX3XXX4XXX5XXX · 3 holders which blocks → SOUTHWESTERN BELL 9533 WHARTON TX
— 979-532 9XXX which blocks → SOUTHWESTERN BELL 9533 WHARTON TX
— 979-533 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WHARTON TX
— 979-534 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 EL CAMPO TX
— 979-535 0XXX1XXX2XXX5XXX6XXX9XXX · 3 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 DEANVILLE TX
— 979-540 1XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 GIDDINGS TX
— 979-541 0XXX1XXX2XXX8XXX · 2 holders which blocks → SOUTHWESTERN BELL 9533 EL CAMPO TX
— 979-542 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 GIDDINGS TX
— 979-543 not yet reported which blocks → SOUTHWESTERN BELL 9533 EL CAMPO TX
— 979-548 none assigned yet which blocks → WINDSTREAM SUGAR LAND, LLC 2147 SWEENY TX
— 979-551 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRENHAM TX
— 979-553 6XXX7XXX which blocks → CONSOLIDATED COMMUNICATIONS OF TEXAS COMPANY 2072 DAMON TX
— 979-555 not yet reported which blocks → MULTIPLE OCN LISTING MULT DIR ASST TX
— 979-561 none assigned yet which blocks → COLORADO VALLEY TEL. COOP., INC. 2059 HIGH HILL TX
— 979-562 none assigned yet which blocks → COLORADO VALLEY TEL. COOP., INC. 2059 MORAVIA TX
— 979-567 not yet reported which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 CALDWELL TX
— 979-571 not yet reported which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRYAN TX
— 979-574 2XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 BRYAN TX
— 979-575 none assigned yet which blocks → AERIAL COMMUNICATIONS, INC. 6701 BRYAN TX
— 979-578 7XXX which blocks → SOUTHWESTERN BELL 9533 EL CAMPO TX
— 979-589 0XXX4XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 KURTEN TX
— 979-595 3XXX4XXX which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 BRYAN TX
— 979-596 0XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 4344 SOMERVILLE TX
— 979-606 not yet reported which blocks → MATRIX TELECOM, LLC. S/I/I TNCI - TX 7715 HEMPSTEAD TX
— 979-611 not yet reported which blocks → MULTIPLE OCN LISTING MULT XXXXXXXXXX TX
— 979-616 1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 EL CAMPO TX
— 979-618 8XXX which blocks → AERIAL COMMUNICATIONS, INC. 6701 WHARTON TX
— 979-627 1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 6 holders which blocks → SOUTHWESTERN BELL 9533 SEALY TX
— 979-637 2XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 EL CAMPO TX
— 979-645 2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 6 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 HEMPSTEAD TX
— 979-647 none assigned yet which blocks → WINDSTREAM SUGAR LAND, LLC 2147 SWEENY TX

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.